void main() {
  //flutter类似于java. String a= "小狗"
  // 数字类型num(既包含整数也包含小数) int(整数) double(小数)
  int money = 130;
  num price = 15.2;
  num count = money + price;
  print(count);



  
  //整数
  int age = 0;
  while (age <= 18) {
    if (age == 18) {
      print('恭喜你成年了');
    }
    age++;
  }



  
  double god = 899.22;
  print(god);

  price= god;
  print(price);
  
}
